The Ultimate Support SP100B Speaker Pole is an air powered speaker pole that mounts into subwoofer pole inserts. The SP100B gets your speakers up with minimal effort. The air powered mechanism lets you adjust the height of your speaker from 40 to 60 inches. Plus the SP100B has the Perfect Fit speaker adapters to accomodate 1 1/2 and 1 3/8 inch mounts. Load capacity is 150 pounds.